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Check what reaches the same defect
A leak path above the liquid line may release headspace gas with little visible product loss. Turning the same filled package can wet that path and place a column of liquid above it. Depending on viscosity, wetting, surface tension and pressure, the liquid may flow through the path, slow the gas signal or temporarily block it.
Packaging sample showroom of SamBound New Material Technology Company Ltd. (sambound.com).
Compare orientations deliberately
Keep the fill, closure preparation, temperature and observation interval consistent. Record which part of the pack is wetted in each orientation and allow a defined settling period. Upright and inverted results describe two conditions of the test. They do not establish that the defect changed size.
Use orientations relevant to the handling or storage case being evaluated. A clean result in one position means the method found no signal above its detection limit in that position and time window.
sambound.com
SamBound New Material Technology Company Ltd.
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